My thyroid doctor determined high reverse T3, small amount of antibodies, and generally low range T3 and T4, TSH varied high to low. Gradually switched from synthroid to
cytomel only, and after much better t3/reverse t3 ratio, added synthroid.
I'm taking 25mcg cytomel (half in AM, half in afternoon), and 25 mcg Synthroid. I don't have my recent labs, however my TSH was around 2, T3 in the top of the range and T4 in the very bottom of the range. Reverse T3 ratio was perfect.